Magnetic valve for organs and the like



.AL H. HANKEY MAGNETIC VALVE FOR ORGANS AND THE LIKE Filed April 17', 1925 @Hom/m93 fj Patented .lune l, 1926.

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JOI-INAH.' HANKEY, OF HAGERSVTOWN, MARYLAND, ASSGNOR TO THE W'. H. REISNER MFG. CO., INC., 0F HAGERSTOWN, MARYLAND, A CORPQRATON OF MARYLAND.

MAGNETIC VALVE' FOR ORGANS vAND THE LKTI.

Application filed April 17', 1925.- Serial No. 23,889.

The invention relates to certain improvements in magnetic valves for organs and like instruments in which a valve disk is actuated by an electromagnet to uncover an air port, said valve disk involvingy a magnetic element, such asa soft iron plate, which will be attracted by the electromagnet when the latter is energized, a typical device of this general character being exemplified in Patent No. 1,387,664, dated August 16, 1921. The object of the invention is to so construct the valve disk that the facing elements, associated with the soft iron core, which elements serve on the one hand to provide an air-tight seal between the valve and its seatand, one the other, to prevent the soft iron core freezing to the poles of the magnet, will not be impaired or deranged by the normal operation of the valve mechanism. To these ends, the invention comprises a composite disk, including a disk or plate of magnetic material, such as soft iron, facing disks or plates of paper, or similar material, disposed on opposite faces of the disk or plate ofr magnetic material, and a rim o'f non magnetic material, such as sheet copper, formed about and embracing the peripheral edges of the composite valve structure, preferably in such manner as to compress the marginal and peripheral portions of the facing members, so that the centers of the latter extend beyond the planes of the rim.

The invention is illustrated in the accompanying drawings, in which Fig. 1 is a side elevation, partly in section, of a typical electromagnetic valve, including the novel form of valve disk.

Fig. 2 is an exploded view showing the several elements which make up the composite disk valve, in the order of assembling the same.

Fig. 3 is a vertical cross section through the valve disk.

Referring to the drawings, 1 indicates the base plate or support, which is usually formed as a casting of relatively soft metal alloy, provided on its under face with a chamber or recess 4 constituting a windway delined by a continuous flange 5 forming an integral part of the baseplate 1, said chamber 4 terminating in a port or opening 3 through the top of the base 1. The chamber 4l is closed bya cover plate 15, which is removably secured to the base 1 by means of a-pivoted latch 2O having -a hooked end, which engages a recess in the reduced end 11 of a stud 1() .formed integral with and projectingv from the base portion 1. The said ycover plate is also provided with an extruded or convexed boss-like member 17 substantially opposite the poles 26-26 of the electromagnet secured to the base, said boss having a central screw threaded opening in which is adjustably mounted an ex ternally screw threaded thimble 17, which constitutes a valve seat, which is adjustable toward and from the poles of the magnet aforesaid.

Mounted within the recess, above the valve seat, is a valve disk 30, which normally engages the upper edge of the nipple 17 to close the port through the said thimble to the passage of air, said valve disk being lifted from its seaton the thimble, when the electromagnet is energized. Said valve disk comprises a central sheet 31 of magnetic material, vpreferably soft iron, and two cover sheets 32-32V disposed on opposite sides thereof, preferably formed of paper, or similar flexible fabric, the three circular sheets or disks being secured rigidly together by means of an annulus of sheet copper, or equivalent material, which embraces the peripheral edges of the assembled disks and overlies the peripheral margins of the fabric disks and compresses said peripheral margins below the normal planes of the outer surfaces of said fabric disks, as more particularly illustrated in Fig. 3. The confining rim or annulus is first formed as a cup-like member 33 having an opening in its bottom, into which cup-like member said disks 31 and 32 are placed in proper sequence, after which the vertical rim of the member 33 is either spun or compressed to form an inwardly extending annular flange parallel with and substantially 4co-extensive with the iiange constituting the bottom of the cup-like member 33. rlhe two fabric .facing members of the valve disk project beyond the rim embracing annulus 33, so that the lower cover member 32 constitutes a yielding resilient surface engaging the valve seat to effectively close the valve port in the thimble 17, while the upper facing member 32, similarly projecting beyond the plane of the upper rim of the annulus 33, engages the poles of the electromagnet Cit vulves 'or orggnns und like instruments Willi e'i )ailier glued or cemented te the e@ e aces of tlie 'elve disks proper, .frliieli re el: eeft lren, er other may'neie ineerie 7 but it was; found that these peper coverings are 'frequently daineglje'l Or deranged by me mns-"mnt Operation of the vulve, and 'ille prei-sent invention is designed lo ebvizale liege diieuli'ies and to prof'ide a s'rong :1nd dur: lne Valve disk in which the gurls eennm be :weidennlljy' displaced and che em'er slieeis consisting ef paper, or

u are permanently secured equivalent te the inerinedinte disk of magnetic ma Le 'inl und serre their nez-nml functions Willr out danger of impairment or derungen'xen, the resnlant salve disk being especially elfu feetive und durable under the niest exacting Conditions ef use.

A Valve disk for electric organ :ntiens eeinilirising an ineri'iediete sheet el ning; neie inzzerial, outer sheets of fabric, :1nd :in ennnlns embracing the edges el the superposed sheets and having lateral flanges overlying and compressing; the peripheral inergins of *die fabric sheets below the einer surfaces o the latter.

ln testimony whereof l a'llx my signeture.

JGHN H. HANKEY. 

